在中间件获取路由定义 [英] Get route definition in middleware

问题描述

有没有人知道是否可以获得用于触发路由的路径？

例如，假设我有这个：

  app.get（'/ user /：id'，function（req，res）{}）; 
  

使用以下简单的中间件

  function（req，res，next）{
 req。 
}）; 
  

我想要获得 / user /：id 在中间件中，这不是 req.url 。

解决方案

你想要的是 req.route.path 。

例如：

  app.get（'/ user /：id？'，function（req，res）{
 console.log（req。路线）; 
}）; 
 
 //输出像
 
 {path：'/ user /：id？'，
 method：'get'，
 callbacks： [功能]]，
键：[{name：'id'，可选：true}]，
 regexp：/ ^ \ / user（？：\ /（[^ \ / +？））？\ /？$ / i，
 params：[id：'12']} 
  

http://expressjs.com/api.html#req.route

---

编辑：

正如在中间件中得到 req.route 的意见是困难/骇人听闻的。路由器中间件是填充 req.route 对象的路由器中间件，它可能处于比正在开发的中间件更低的级别。

这样，只有在挂接到路由器中间件才能解析 req

时，才能获得 req.route code>给您，由Express本身执行。

Does anyone know if it's possible to get the path used to trigger the route?

For example, let's say I have this:

app.get('/user/:id', function(req, res) {});

With the following simple middleware being used

function(req, res, next) {
     req.?
});

I'd want to be able to get /user/:id within the middleware, this is not req.url.

解决方案

What you want is req.route.path.

For example:

app.get('/user/:id?', function(req, res){
  console.log(req.route);
});

// outputs something like

{ path: '/user/:id?',
  method: 'get',
  callbacks: [ [Function] ],
  keys: [ { name: 'id', optional: true } ],
  regexp: /^\/user(?:\/([^\/]+?))?\/?$/i,
  params: [ id: '12' ] }

http://expressjs.com/api.html#req.route

---

EDIT:

As explained in the comments, getting req.route in a middleware is difficult/hacky. The router middleware is the one that populates the req.route object, and it probably is in a lower level than the middleware you're developing.

This way, getting req.route is only possible if you hook into the router middleware to parse the req for you before it's executed by Express itself.

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